NetBSD/sys/arch/vax/include/byte_swap.h

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/* $NetBSD: byte_swap.h,v 1.2 2000/07/01 06:43:42 matt Exp $ */
/*
* Copyright (c) 1987, 1991 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)endian.h 7.8 (Berkeley) 4/3/91
*/
#ifndef _VAX_BYTE_SWAP_H_
#define _VAX_BYTE_SWAP_H_
#define __byte_swap_long_variable(x) __extension__ \
({ register u_int32_t __y, __x = (x); \
\
__asm ("rotl $-8, %1, %0; \
insv %0, $16, $8, %0; \
rotl $8, %1, r1; \
movb r1, %0" \
: "=&r" (__y) \
: "r" (__x) \
: "r1", "cc" ); \
__y; })
#define __byte_swap_word_variable(x) __extension__ \
({ register u_int16_t __x = (x); \
\
(u_int16_t)(__x << 8 | __x >> 8); \
})
#define __byte_swap_long(x) __byte_swap_long_variable(x)
#define __byte_swap_word(x) __byte_swap_word_variable(x)
#endif /* _VAX_BYTE_SWAP_H_ */